We're working on a new site. Click here to get a sneak preview.
Medical Dictionary


adj ef·fec·tive \i-ˈfek-tiv\

Medical Definition of EFFECTIVE

:  producing a decided, decisive, claimed, or desired effect <a drug judged effective by an evaluating panel>
ef·fec·tive·ly adverb
ef·fec·tive·ness noun


How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears